To prepare a sheet of high-quality release paper without using an organic solvent by forming a release agent layer on a barrier layer formed on at least one surface of a paper substrate.
This substrate for a sheet of release paper 1 is prepared by coating at least one surface of a paper substrate 2 with an undercoating agent prepared by emulsifying a self-cross-linking type styrene-butadiene copolymer having ≥10°C glass transition temperature, 0-20°C minimal film-forming temperature and a reactional functional group such as divinylbenzene with a surfactant having a reactional group such as a methacryloylpolyoxyethylene sulfate salt and forming a barrier layer 3. Furthermore, a release agent layer 4 comprising a silicone emulsion is then formed on the barrier layer 3 of the resultant substrate to afford the sheet of release paper 1.
OKADA SACHIKO
MATSUZAKI SUSUMU
DAINIPPON INK & CHEMICALS